Lana Wood, sister of the late Natalie Wood, is speaking out about the newly re-opened investigation into the actress' death, which took place 30 years ago this week.

The Natalie Wood case was never a closed case in her Lana’s mind, which, she said, is why she welcomed Friday's news of police re-opening the investigation.

Questions have surrounded the late actress' husband, Robert Wagner, and his handling of the incident, though he was never a criminal suspect and is not now.

“I can’t believe [Robert] would purposefully do something to hurt her,” Wood said, but adds that she "did not buy" the story Wagner told police at that time.

He said Natalie Wood slipped, hit her head and fell into the water.

“I don’t think she fell. I don’t know if she was pushed. I don’t know whether there was an altercation and it happened accidentally,” she said. “She shouldn’t have died.”

Natalie Wood who had a notorious fear of water, was found dead in the ocean off Catalina Island following an alcohol-filled night spent on a yacht with only Wagner, family friend Christopher Walken, and Dennis Davern, the boat's captain.

Lana Wood says she has had many discussions over the years with Davern, which have led her to believe there is more to the story of her sister’s death.

“He said that everybody was quite drunk and that a fight, or an argument, I should say, did break out and that Natalie was in the water and that he and [Robert] did nothing to pull her out,” she told celebrity gossip site TMZ.

According to Wood, Davern told her Wagner said: “Leave her. Teach her a lesson.”

Davern admitted that he was drunk at the time and initially lied to police, but now says he remembers Wood and Wagner getting into a heated argument.

“Robert Wagner had taken a bottle of wine and smashed it on the coffee table in front of her and Christopher,” Davern said on Good Morning America.

“Natalie Wood went to her stateroom, and Robert Wagner followed and they carried on their arguing in the stateroom.”

Moments later, he said, Wagner told him Wood was missing, but urged him not to call the Coast Guard right away.

“I said to Robert Wagner, ‘Let’s turn on the search light, we’ll see maybe if we can’t see her out there,’” Davern said.

“And he said, ‘No, we’re not going to do that at this time.’”

Wagner, now 81, recently released a statement saying he supported the investigation, however he also suggested this may be a ploy for Davern to make money on his book and the 30th anniversary of Natalie’s death.